Controller.



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nu rd 2 2 ward rality of contacts, a brush-carrying arm movable relatively to said contacts about a pivot fixed in relation thereto, and a spring movable about the same ivot into and out of engagement with the orush.

2. ln a rheostat, the combination of a series of contacts,a brush carried by a pivoted arm and movable over said contacts, a ring pivoted on the same axis as said arm and carrying a spring, and a lliexible connection connected to said ring and said brush, said ring and the lnush-carrying arm being movable relatively to bring the spring carried by the ring into and out oi' engagement with said brush.

3. ln a rheostat, the. combination of a series of contacts, a brush movable over said contacts and carried by a pivoted arm, a-

spring rotatable about the same pivot as the arm and relatively thereto so that it can be brought into and out of engagement with said brush, and means for preventing relative movement of the spring and arm unless the spring is rlrst raised away from the brush.

4. ln a rheostat, the combination of a plurality of series of contacts, a corresponding plurality oit brushes cooperating with said respective series and carried by a support rotatable relatively to said contacts, and spring vfingers pivoted on the same axis as said support and normally engaging the respective brushes to press them against the contacts but movable about the pivot relatively to said support to be disengaged from the brushes.

5. ln a rheostat, the combination of aluy rality of series of contacts, a corresponding plurality of brushes cooperating with said respective series and carried by a support rotatable relatively to said contacts, and spring lingers pivoted on the same axis as said support and normally engaging the respective brushes to press them against the contacts but movable as a unit about the pivot relatively to said support to be disengaged from the brushes.

o. ln a rheostat, the coinbination of a plurality ol" series et' contacts, a (-.orrespomlinlr plurality el brushes cooperating with sai( respective series and carried by a support rotatable relatively to said contacts, a sprin pivoted on the same axis as said support an normally engaging the respective brushes to press them against the contacts but movable about said pivot relatively to said support to be disengaged from the brushes, and means for normally preventing movement of the springs relatively to said support when the springs are in engagement with said brushes.

7. ln a rheostat, the combination of a lurality of series of contacts, a correspon in@ plurality of brushes cooperating with said respective series and carried by a support rotatable relatively to said contacts, a sprin pivoted on the same axis as said support an normally engaging the respective brushes to press them against the contacts but 'movable as a unit about said pivot relatively to said support to be disengaged from the brushes, and means for normally preventing movement ofthe springs relatively to said su port when the springs are in engagement witli said brushes.

8. ln a rheostat, the combination of a. lurality of series of contacts, a correspon ino plurality of brushes cooperating with sai respective series and carried by a support rotatable relatively to said contacts, a ring pivoted on the same axis as said support and carrying springs which normally engagethe respective brushes to press them against the contacts but movable relatively to said support to disengage the springs and brushes, and ilexible conductors carried by said ring and connected to said respective brushes.

9. ln a controller, the combination of fixed and movable members, an operating handle fixed on the movable member and substantially in the same plane, a plate fixed relatively to the fixed member and notched on the edge remote from the handle, and a push'- buttoncarried by the operating handle and carrying a latch which cooperates With'the notches of said notched ilate.

ln testimony whereof affix my signature, in the presence of two witnesses.

HERBERT W. CHENEY.

l/Vitnesses:

(lso. B. Seurin', Flinn J. KINsnY. 

